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v3.25.3

Investments - Gross Unrealized losses by Major Security (Detail) $ in Millions | Sep. 30, 2025 USD ($) security | Dec. 31, 2024 USD ($) security | Sep. 30, 2024 USD ($) security
--- | --- | --- | ---
Number of Securities |  |  |
Total | security | 676 | 1,073 | 903
Less than 12 Months | security | 109 | 342 | 86
12 Months or Greater | security | 567 | 731 | 817
Fair Value |  |  |
Total | $ 20,495 | $ 53,784 | $ 25,490
Less than 12 Months | 3,472 | 35,528 | 3,411
12 Months or Greater | 17,023 | 18,256 | 22,079
Unrealized Losses |  |  |
Total | (850) | (1,935) | (1,258)
Less than 12 Months | (11) | (485) | (6)
12 Months or Greater | $ (839) | $ (1,450) | $ (1,252)
U.S. government obligations |  |  |
Number of Securities |  |  |
Total | security | 71 | 113 | 86
Less than 12 Months | security | 7 | 39 | 3
12 Months or Greater | security | 64 | 74 | 83
Fair Value |  |  |
Total | $ 11,145 | $ 38,782 | $ 12,919
Less than 12 Months | 1,777 | 30,257 | 2,069
12 Months or Greater | 9,368 | 8,525 | 10,850
Unrealized Losses |  |  |
Total | (413) | (1,151) | (574)
Less than 12 Months | (3) | (418) | (3)
12 Months or Greater | $ (410) | $ (733) | $ (571)
State and local government obligations |  |  |
Number of Securities |  |  |
Total | security | 251 | 379 | 302
Less than 12 Months | security | 40 | 127 | 44
12 Months or Greater | security | 211 | 252 | 258
Fair Value |  |  |
Total | $ 1,557 | $ 2,339 | $ 1,779
Less than 12 Months | 188 | 783 | 208
12 Months or Greater | 1,369 | 1,556 | 1,571
Unrealized Losses |  |  |
Total | (65) | (117) | (90)
Less than 12 Months | (1) | (6) | 0
12 Months or Greater | $ (64) | $ (111) | $ (90)
Foreign government obligations |  |  |
Number of Securities |  |  |
Total | security |  |  | 1
Less than 12 Months | security |  |  | 0
12 Months or Greater | security |  |  | 1
Fair Value |  |  |
Total |  |  | $ 16
Less than 12 Months |  |  | 0
12 Months or Greater |  |  | 16
Unrealized Losses |  |  |
Total |  |  | (1)
Less than 12 Months |  |  | 0
12 Months or Greater |  |  | $ (1)
Corporate and other debt securities |  |  |
Number of Securities |  |  |
Total | security | 138 | 304 | 224
Less than 12 Months | security | 24 | 122 | 14
12 Months or Greater | security | 114 | 182 | 210
Fair Value |  |  |
Total | $ 3,503 | $ 7,034 | $ 5,251
Less than 12 Months | 718 | 2,935 | 426
12 Months or Greater | 2,785 | 4,099 | 4,825
Unrealized Losses |  |  |
Total | (86) | (215) | (156)
Less than 12 Months | (4) | (33) | (3)
12 Months or Greater | $ (82) | $ (182) | $ (153)
Residential mortgage-backed securities |  |  |
Number of Securities |  |  |
Total | security | 28 | 40 | 33
Less than 12 Months | security | 9 | 12 | 4
12 Months or Greater | security | 19 | 28 | 29
Fair Value |  |  |
Total | $ 283 | $ 428 | $ 244
Less than 12 Months | 186 | 377 | 185
12 Months or Greater | 97 | 51 | 59
Unrealized Losses |  |  |
Total | (6) | (11) | (6)
Less than 12 Months | (1) | (4) | 0
12 Months or Greater | $ (5) | $ (7) | $ (6)
Commercial mortgage-backed securities |  |  |
Number of Securities |  |  |
Total | security | 138 | 153 | 177
Less than 12 Months | security | 16 | 8 | 5
12 Months or Greater | security | 122 | 145 | 172
Fair Value |  |  |
Total | $ 2,879 | $ 3,294 | $ 3,750
Less than 12 Months | 375 | 264 | 170
12 Months or Greater | 2,504 | 3,030 | 3,580
Unrealized Losses |  |  |
Total | (247) | (376) | (377)
Less than 12 Months | (1) | (16) | 0
12 Months or Greater | $ (246) | $ (360) | $ (377)
Other asset-backed securities |  |  |
Number of Securities |  |  |
Total | security | 50 | 84 | 80
Less than 12 Months | security | 13 | 34 | 16
12 Months or Greater | security | 37 | 50 | 64
Fair Value |  |  |
Total | $ 1,128 | $ 1,907 | $ 1,531
Less than 12 Months | 228 | 912 | 353
12 Months or Greater | 900 | 995 | 1,178
Unrealized Losses |  |  |
Total | (33) | (65) | (54)
Less than 12 Months | (1) | (8) | 0
12 Months or Greater | $ (32) | $ (57) | $ (54)

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